Steel Dynamics (STLD) Q1 2026 earnings review
Surging Steel Margins Mask Continued Aluminum Start-up Drag
Steel Dynamics delivered a powerful Q1 2026, with revenue accelerating to 19% YoY growth ($5.2B) and Net Income surging 86% YoY to $403 million. The core growth engine is firing on all cylinders: record steel shipments of 3.64 million tons combined with significant metal spread expansion (steel prices rose $86/ton sequentially while scrap costs rose only $22/ton). The biggest blemish remains the highly anticipated Aluminum segment, which actually saw operating losses widen sequentially to $65 million due to a temporary January pause and inventory write-offs. However, the core steel business is generating more than enough profit to fund these growing pains while maintaining robust shareholder returns.
🐂 Bull Case
Steel operations operating income jumped 73% sequentially to $557 million. Realized steel pricing rebounded sharply from late-2025 lows, massively outpacing modest increases in ferrous scrap costs.
The company shipped a record 3.64 million tons of steel, proving that underlying demand across energy, non-residential construction, automotive, and industrial sectors remains incredibly robust.
🐻 Bear Case
Despite previous management optimism for a rapid ramp-up, Aluminum operating losses expanded sequentially from $47M to $65M due to start-up issues and write-offs in January.
Steel Fabrication operating income flatlined sequentially at $90M despite higher shipments, as the segment was squeezed by the very same rising steel input costs that benefited the upstream steel division.
⚖️ Verdict: 🟢
Bullish. The widening steel spreads and record volumes perfectly demonstrate the power of STLD's operating leverage. While the Aluminum segment's $65M loss is a frustrating near-term drag, the 38% YoY surge in the fabrication backlog suggests the broader demand cycle remains highly supportive into late 2026.
Key Themes
Massive Metal Spread Expansion
The primary catalyst for Q1's earnings beat was the widening gap between steel selling prices and scrap costs. Average external product selling prices jumped $86 sequentially to $1,193 per ton, while average ferrous scrap costs only rose $22 sequentially to $396 per ton. This leverage drove a 73% sequential explosion in Steel segment operating income.
Aluminum Start-up Drag Deepens
Contradicting management's previously rosy narrative of a smooth aluminum ramp, operating losses for the Aluminum segment Reversing deeper into the red, hitting $65M in 26Q1 (up from $47M in 25Q4). Management admitted to 'normal startup issues' in January that necessitated a temporary pause and inventory write-offs. While shipments did increase to 22,500 metric tons, the financial drag is currently masking the true earning power of the core business.
Forward Demand Indicators: Fabrication Backlog
Customer order activity in Steel Fabrication has significantly accelerated since late 2025. The customer order backlog is now 38% higher YoY and extends deep into October 2026. This provides tremendous forward visibility for the company's downstream platform.
Fabrication Margin Squeeze
While downstream volume is a Driver, the profitability of that volume is Decelerating. Steel Fabrication operating income was flat sequentially at $90M despite higher physical shipments. The culprit is margin compression resulting from higher internal steel raw material input costs. The business is currently failing to pass these higher steel prices onto the end customer at the same rate.
Macro Tailwinds Accelerating
Management explicitly cited a heavily supportive macro environment as the foundation for the current demand surge. The combination of domestic trade actions, manufacturing onshoring, and aggressive U.S. infrastructure program funding is actively fueling demand for structural steel, railroad rail, and flat rolled products.
CASH Line Automotive Qualifications
The company reported specific technological progress in the Aluminum segment, successfully producing and receiving qualifications for automotive quality finished products from its first continuous anneal and solution heat treat (CASH) line. A second CASH line is scheduled to commission in Q3 2026, which is critical for accessing high-margin auto end-markets.
Other KPIs
Accelerating dramatically. Operating income surged 155% sequentially from $18.6M in 25Q4. This was driven entirely by higher ferrous and nonferrous average selling values, as physical shipments were actually marginally lower due to winter weather impacting scrap flows in early 2026.
Stable YoY. Q1 operating cash flow is optically low compared to Net Income ($403M) because it absorbs the company's annual retirement profit-sharing distribution, which was an outflow of $120 million this quarter. Working capital also increased by $413 million as product pricing and demand improved, tying up cash in receivables and inventory.
Guidance
Accelerating. Management stated that January's startup issues were resolved and they believe both shipments and earnings for the Aluminum segment will 'increase sharply in the second quarter 2026.' However, they stopped short of explicitly guiding to positive EBITDA for the quarter.
Accelerating. The capital build-out continues with the San Luis Potosi facility and Columbus, MS mill. The third of three planned cold mills and the second CASH line are scheduled to commission in 26Q3, pushing the facility closer to full operational capacity.
Key Questions
Aluminum Profitability Timeline
With the Aluminum segment generating a $65M operating loss in Q1 due to startup issues, what is the exact timeline to reach EBITDA breakeven? Are the January inventory write-offs fully behind us, or are yield issues still suppressing margins?
Fabrication Margin Pass-Through
Steel Fabrication backlog is up 38% YoY, but margins compressed in Q1 due to rising steel input costs. How quickly do your fabrication contracts allow you to pass through these higher steel costs to end customers?
Sustainability of Steel Spread
Steel prices increased $86/ton while scrap only rose $22/ton sequentially. Given the current influx of scrap generation expected in the spring, do you see this widened metal spread holding steady through Q2, or will scrap costs catch up?